Mary, Queen of Scots. Queen of Scotland (1542 -1567). Was seen by many English Catholics as rightful heir to English throne, rather than Elizabeth I. Executed for alleged treason against Elizabeth I: 8 December 1542 8 February 1587.Mary, Queen of Scots. Queen of Scotland (1542 -1567). Was seen by many English Catholics as rightful heir to English throne, rather than Elizabeth I. Executed for alleged treason against Elizabeth I: 8 December 1542 8 February 1587. (Photo by Culture Club/Getty Images) *** Local Caption ***
